Fixed the setmac command can`t be used when the gcc was updated.

when we updated to gcc 4.4.0, the compiler would change the uninitialized param to 1 when ac = 3,
which is beyond our expectation. So just initialize the param.

Change-Id: I4e3f5ecd05015114eefd2307129d4a4458f5bbee
Target: 3A2H

Targets/Bonito3a2h/dev/eeprom.c

@@ -334,7 +334,7 @@ int cmd_eeprom_write(int ac, unsigned char *av[])
 
 int cmd_setmac(int ac, unsigned char *av[])
 {
-	int i, j, v, count, data_addr, param;
+	int i, j, v, count, data_addr, param = 0;
 	unsigned char *s = NULL;
 	unsigned char buf[32];
 	u32 base = (board_ver_num == LS3A2H_BOARD_OLD) ?